Teide volcano.
This radar image shows the Teide volcano on the Island of Tenerife in the canary islands. The canary islands, part of spain, are located in the Eastern Atlantic ocean of the coast of morocco. Teide has erupted only once in the 20th Century, in 1909, but is considered a potentially threatening volcano due todo its proximity todo the city of santa cruz de Tenerife, shown in this image as the Purple and white área on the lower right Edge of the Island. The summit crater of Teide, clearly visible in the left center of the image, contains lava flows of various ages and roughnesses that appear in shades of green and Brown. Diferent vegetation zones, both natural and agricultural, are detected by the radar as áreas of Purple, green and yellow on the volcano flanks. Scientists are using images such as this todo understand the evolution of the structure of Teide, especially the formation of the summit caldera and the potential for collapse of the flanks. The volcano is one of 15 identified by scientists as potentially hazardous todo local populations, as part of the international decade volcano programa. The image was acquired by the spaceborne imaging radar-c/x-band Synthetic Aperture radar (sir-c/x-sar) onboard the space Shuttle endeavour on october 11, 1994. Sir-c/x-sar, a Joint mission of the Germán, italian and the United States space agencies, is part of nasa misión todo planet Earth. The image is centered at 28.3 Degrees north Latitude and 16.6 Degrees west longitude. North is toward the upper right. The área shown measures 90 kilometers by 54.5 kilometers (55.8 miles by 33.8 miles). The colors in the image are assigned todo diferent frequencies and polarizations of the radar as follows: red is l-band horizontally transmitted, horizontally received, green is l-band horizontally transmitted, vertically received, blue is c-band horizontally transmitted, vertically received.
P-45741 august 10, 1995
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Spaceborne imaging radar-c and x-band Synthetic Aperture radar (sir-c/x-sar) is part of nasa misión todo planet Earth. The radars Illuminate Earth with microwaves allowing detailed observations at any time, regardless of weather or Sunlight conditions. Sir-c/x-sar uses thre microwave wavelengths: l-band (24 cm), c-band (6 cm) and x-band (3 cm). The multi-frequency data Will be used by the international scientific community todo better understand the global environment and how it is changing. The sir-c/x-sar data, complemented by aircraft and Ground studies, Will give scientists clearer insights into those environmental changes which are caused by nature and those changes which are induced by human activity. Sir-c was developed by nasa jet propulsion laboratory. X-sar was developed by the dornier and alenia spazio companies for the Germán space agency, deutsche agentur fuer raumfahrtangelegenheiten (dará), and the italian space agency, agenzia spaziale italiana (así), with the deutsche forschungsanstalt fuer luft und raumfahrt eh, v, (dlr), the major partner in Science, operations, and data processing of x- Sar.